From 7c37ef0b4795342ea0d673ba32a22369151f7e1e Mon Sep 17 00:00:00 2001
From: Lennart Eriksson <lennart.eriksson91@gmail.com>
Date: Thu, 22 Sep 2016 08:31:51 +0200
Subject: [PATCH] temp checkin

---
 UAV-ControlSystem/inc/drivers/I2C.h | 19 ++++++++++
 UAV-ControlSystem/src/drivers/I2C.c | 56 +++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 UAV-ControlSystem/inc/drivers/I2C.h
 create mode 100644 UAV-ControlSystem/src/drivers/I2C.c

diff --git a/UAV-ControlSystem/inc/drivers/I2C.h b/UAV-ControlSystem/inc/drivers/I2C.h
new file mode 100644
index 0000000..aed20ad
--- /dev/null
+++ b/UAV-ControlSystem/inc/drivers/I2C.h
@@ -0,0 +1,19 @@
+/*
+ * I2C.h
+ *
+ *  Created on: 21 sep. 2016
+ *      Author: len12007
+ */
+
+#ifndef DRIVERS_I2C_H_
+#define DRIVERS_I2C_H_
+
+#include "stm32f4xx.h"
+
+
+void i2c_configure(void);
+
+
+
+
+#endif /* DRIVERS_I2C_H_ */
diff --git a/UAV-ControlSystem/src/drivers/I2C.c b/UAV-ControlSystem/src/drivers/I2C.c
new file mode 100644
index 0000000..c2216ec
--- /dev/null
+++ b/UAV-ControlSystem/src/drivers/I2C.c
@@ -0,0 +1,56 @@
+/*
+ * I2C.c
+ *
+ *  Created on: 21 sep. 2016
+ *      Author: len12007
+ */
+
+#include "drivers/I2C.h"
+
+
+
+
+void i2c_configure(uint32_t channel)
+{
+
+	GPIO_InitTypeDef GPIO_InitStruct;
+	I2C_InitTypeDef I2C_InitStruct;
+
+	// enable APB1 peripheral clock for I2C1
+	RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
+	// enable clock for SCL and SDA pins
+	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
+
+	/* setup SCL and SDA pins
+	 * You can connect I2C1 to two different
+	 * pairs of pins:
+	 * 1. SCL on PB6 and SDA on PB7
+	 * 2. SCL on PB8 and SDA on PB9
+	 */
+	GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7; // we are going to use PB6 and PB7
+	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;			// set pins to alternate function
+	GPIO_InitStruct.Speed = GPIO_SPEED_LOW;		// set GPIO speed
+//	GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;			// set output to open drain --> the line has to be only pulled low, not driven high
+	GPIO_InitStruct.Pull = GPIO_PULLUP;			// enable pull up resistors
+	GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
+	GPIO_Init(GPIOB, &GPIO_InitStruct);					// init GPIOB
+
+	I2C_InitStruct.ClockSpeed = 100000;
+	I2C_InitStruct.DualAddressMode =
+
+	// Connect I2C1 pins to AF
+	GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);	// SCL
+	GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_I2C1); // SDA
+
+	// configure I2C1
+	I2C_InitStruct.I2C_ClockSpeed = 100000; 		// 100kHz
+	I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;			// I2C mode
+	I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;	// 50% duty cycle --> standard
+	I2C_InitStruct.I2C_OwnAddress1 = 0x00;			// own address, not relevant in master mode
+	I2C_InitStruct.I2C_Ack = I2C_Ack_Disable;		// disable acknowledge when reading (can be changed later on)
+	I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; // set address length to 7 bit addresses
+	I2C_Init(I2C1, &I2C_InitStruct);				// init I2C1
+
+	// enable I2C1
+	I2C_Cmd(I2C1, ENABLE);
+}